Datasheet LTC3603 (Analog Devices) - 3

LTC3603
electrical characteristics The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 12V unless otherwise specified (Note 2). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PVIN Operating Voltage Range 4.5 15 V VFB Regulated Feedback Voltage ITH = 0.7V (Note 3) l 0.594 0.6 0.606 V DVFB(LINEREG) Feedback Voltage Line Regulation VIN = 5V to 15V, ITH = 0.7V 0.005 %/V DVFB(LOADREG) Feedback Voltage Load Regulation ITH = 0.36V to 0.84V l 0.02 0.1 % DVPGOOD Power Good Range ±10 ±12 % RPGOOD Power Good Resistance 55 80 Ω IFB FB Input Bias Current 10 nA gm Transconductance Amplifier gm 1.7 mS IS Supply Current (Note 4) Active Mode 500 700 µA Sleep Mode 75 100 µA Shutdown 0.2 1 µA INTVCC VCC LDO Output Voltage 4.7 4.9 5.1 V tON, MIN Minimum Controllable ON-Time 95 115 ns VRUN RUN Pin ON Threshold VRUN Rising l 0.4 0.7 1.1 V ITRACK/SS TRACK/SS Pull-Up Current TRACK/SS = 1V 1.25 µA fOSC Oscillator Frequency RT = 105k 0.85 1 1.15 MHz fSYNC SYNC Capture Range 0.3 3 MHz RDS(ON) Top Switch On-Resistance 85 mΩ Bottom Switch On-Resistance 45 mΩ ILIM Peak Current Limit 3.8 4.5 5.2 A ILSW Switch Leakage Current 0.1 1 µA VUVLO INTVCC Undervoltage Lockout INTVCC Ramping Up l 4.1 4.2 4.3 V VUVLO, HYS INTVCC Undervoltage Lockout Hysteresis 700 mV
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3603 is tested in a feedback loop that adjusts VFB to may cause permanent damage to the device. Exposure to any Absolute achieve a specified error amplifier output voltage (ITH). Maximum Rating condition for extended periods may affect device
Note 4:
Dynamic supply current is higher due to the internal gate charge reliability and lifetime. being delivered at the switching frequency.
Note 2:
The LTC3603 is tested under pulsed load conditions such that
Note 5:
TJ is calculated from the ambient temperature TA and the power TJ ≈ TA. The LTC3603E is guaranteed to meet specifications from dissipation as follows: TJ = TA + (PD)(θJAºC/W). 0°C to 85°C junction temperature. Specifications over the –40°C to
Note 6:
This IC includes overtemperature protection that is intended 125°C operating junction temperature range are assured by design, to protect the device during momentary overload conditions. Junction characterization and correlation with statistical process controls. The temperature will exceed 125°C when overtemperature protection is active. LTC3603I is guaranteed over the –40°C to 125°C operating junction Continuous operation above the specified maximum operating junction temperature range. Note that the maximum ambient temperature temperature may impair device reliability. consistant with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal
Note 7:
This limit indicates the current density limitations of the internal impedance, and other environmental factors. metallization and it is not tested in production. 3603fc For more information www.linear.com/LTC3603 3